I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
mannite manito manitu manned manatee manitou manteau manta monte manat maned meant monied minute mantua moaned mentee mint maund minty monde mined mount hymned maenad maundy mehndi minuet mooned
mannite dunnite nite whinnied tannate sienite dunite sennit finite hinnied innate connate connote reunite gunite kainite lenite pennate pinite pinnate gahnite unite shinnied nit